Aerosols Characterization during the Holi festival in Dehradun: Foothills of the Himalayas, India

摘要

In this study, Partisol 2300 speciation sampler and ICP-OES were used for determining the mass and elemental composition of fine particulate matter (PM25) during Holi festival week 13,h March 2014 to 20th March 2014 at Dehradun, India. Chemical analysis for 15 elements (Fe, Ni, Cr, Mn, Cu, Zn, Cd, As, Pb, Na, K, Al, Mg, Sb and Ca) were carried out with the collected samples (n=8). The order of concentration of chemical species during holi festival days were K>Fe>Na>Mn>Mg>Cr> Zn>Ca>Al>Cu>As>Pb>Ni>Sb>Cd. Aethalometer was used for determining the Black Carbon (BC) concentration and percentage of black carbon contributed by the biomass burning (BB). The average mass concentration of PM_(2.5) and BC during holi festival week (pre-Holi (3 days), holi(holifestival days) (2 days) and post-holi (3 days)) period was found to be 41.58, 68.61,42.96 mug/m~3 and 4.97 ± 1.89, 7.61 ± 2.37, 3.20 ± 2.46 ug/m3 respectively. The percentage of BC contributed by BB during pre-Holi, Holi and post-Holi period was 15.05 %, 18.20 % and 17.24 %. On analyzing the concentration of PM_(2.5), BC, surface ozone (O_3), oxides of nitrogen (NO_x) during the sampling period, substantial increase in concentration was observed during Holi from pre-Holi period.